<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        function father(name,age){
            this.name = name;
            this.age = age;
        }
        father.prototype.say = function(){
            console.log('你好');
        }
        function son(name,age){
            father.call(this,name,age);
        }
        son.prototype = new father();
        son.prototype.constructor = son
        const son1 = new son('ls', 18)
        const father1 = new father('zs', 40)
        console.log(son1);
        son1.say()
    </script>
</body>
</html>